ho risolto cosi:
codice:
//da sostituire in blocco
/*background-image: -ms-linear-gradient(top left, #FFFFFF 0%, #CCC f1f2f1%);*/ /*IE10*/
			/*background-image: -moz-linear-gradient(top left, #FFFFFF 0%, #CCC f1f2f1%);*/ /*FIREFOX*/
			/*background-image: -o-linear-gradient(top left, #FFFFFF 0%, #f1f2f1 100%);*//*OPERA*/
			/*background-image: -webkit-gradient(linear, left top, right bottom, color-stop(0, #FFFFFF), color-stop(1, #f1f2f1));*//* Webkit (Safari/Chrome 10) */
			/*background-image: -webkit-linear-gradient(top left, #FFFFFF 0%, #f1f2f1 100%);*//* Webkit (Chrome 11+) */ 
			/*background-image: linear-gradient(to bottom right, #FFFFFF 0%, #f1f2f1 100%);*/ /* W3C Markup, IE10 Release Preview */


//sostituire con questo di seguito
background: -moz-linear-gradient(#fff, #f1f2f1);
			background: -webkit-linear-gradient(#fff, #f1f2f1);
			background: -o-linear-gradient(#fff, #f1f2f1);
			background: -ms-linear-gradient(#fff, #f1f2f1);/*For IE10*/
			background: linear-gradient(#fff, #f1f2f1);
			filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#ffffff', endColorstr='#f1f2f1');/*For IE7-8-9*/ 
			height: 1%;/*For IE7*/
Grazie.